الفهرس 
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Abstract
Due to the incessant suffering of Egypt over the recent times from the consequent economic crises, it has become of crucial importance to outfit efficacious and evolutionary policies away from the monopolized Nile Delta region to tackle the inhabitants living shortcoming. Thus, we have presently focused on the development of the current situation in the Northern coastal zone of Sinai Peninsula (NCZS). Despite the limited previous studies in this regard, there is consensus indispensability to develop comprehensive and sustainable strategies for conserving the hot spots along NCZS from coastal hazards. Accordingly, on the basis of sophisticated methodologies encompassing geospatial tools and automatic computational techniques relying mainly on the coupling between Geographic Information System (GIS) and Digital Shoreline Analysis System (DSAS), this study initially offered a highly reliable tool of a decision-support-algorithm in the form of tabulated decision matrices. This algorism can positively assist in evaluating the coastal changes within three adjacent zones containing, (I) El-Tinah plain bay (TPB); (II) the tidal inlets (1) and (2) of the Bardawil Lagoon (TIBL); and (III) the coast of El-Arish city. In addition, foreseeable decision mappings within 2050 had been introduced for those zones in terms of exceedingly authoritative predictive tool functioned in DSAS coding, namely endpoint rate (EPR). The EPR results showed the emergence of some extremely vulnerable points within the coasts of those zones that indicate the probability of the collapse of some ecosystems, mostly in El Mallaha Lagoon in TPB as well as the Bardawil Lagoon through TIBL. In light of the above results, this study focused on the remediation of non-affirmative consequences, such as shoreline down-side erosion and up-side accretion particularly in the vicinity of TIBL and TPB. Within TIBL, the Littoral Processes and Coastline Kinetics (DHI-LITPACK) numerical model was essentially applied to predict the shoreline responses to numerous different prodigious scenarios considering both hard and soft coastal measures during the period from 2010 to 2030. This study employed MATLAB to construct the inference optimization model using a Mamdani-type fuzzy inference system with a Gaussian membership function to determine the cheapest and most efficient solution with the minimum impact on the sandy barrier zone of TIBL. The model relied mainly on the incorporation of both the scenario efficiency and the overall cost into a single parameter, namely, multiple performance characteristic index (MPCI). The final results revealed that a combination of short groins and one-time nourishment of 250,000 m3 exhibited the best MPCI. This implies that, among the numerous discussed scenarios, the present study can conclusively introduce the optimal solution for the erosion problems within TIBL to Egyptian decision makers. Simultaneously, a two-dimensional hydro-morphological circulation model consisting of two steering modules, CMS-Flow and CMS-Wave, was set up to characterize the anti-navigational and ecological sedimentation within TIBL. Besides the original entrance jetties of TIBL, we proposed subsidiary alternatives based on unorthodox structural modulation scenarios in the vicinity of inlets domain encompassing jetties extension, current deflector wall (CDW), flow-diverted wall (FDW), sediment trap (ST), random radial channels (RC) and lateral wide channel (LWC) to curtail the sedimentary stock. The uses of CDW, RC, or LWC alongside with the current jetties system in TIBL were found to be a worthy compensate for the current dredging operation. This was mainly due to the lower infilling rate and subsequently lower volume of dredging required at the end of the year. Although these alternatives might be found marginally costly, in fact, the long-term benefit that can be gained through dredging maintenance can justify the investments. On the other side, novel seawall designs, which widely recognized as economically effective over the long term, eco-friendly, and multifunctional were proposed and physically tested under the same hydrodynamic circumstances of TPB to effectively enhance its beach against the severe erosion. The proposed seawalls were recommended to be used in TPB instead of the common traditional types of seawalls (e.g., gently sloping dolos types), as the results elucidated a preferable kinematic and hydrodynamic performance. Ultimately, the methodology used in this study was able to properly introduce a range of non-conventional solutions that would improve the coastal, environmental, and economic circumstances for a sector of great strategic importance in NCZS, namely TPB and TIBL. Furthermore, this approach can be straightforwardly intended for other projects, with different environmental and geometrical characteristics.